I've noticed this to be an issue with my 2008 iMac 24". The original 750 GB HDD was greyed out by Disk utility, and wasn't even remotely capable of being formatted, citing a "unable to mount disk" issue everytime.
I went the hard way and disassembled the entire machine, replacing the HDD with another one, though, I feel there are other possible solutions. On Mar 6, 2016 13:52, "Bruce Johnson" <john...@pharmacy.arizona.edu> wrote: > > > On Mar 5, 2016, at 5:43 PM, geof...@gmail.com wrote: > > > > When I boot off DVD, the iMac won't recognise this disk - > > diskutil shows the name, but says it is 0 bytes and > > won't allow format (greyed out). > > Are you looking at the disk itself in Disk utility or the volume? It could > simply be unpartitioned, and so you have to do that, but you only get that > option if you select the disk, not the volume. > > It could also be a DOA disk…your iMac should have no problems with a SATA > III drive. > > -- > Bruce Johnson > University of Arizona > College of Pharmacy > Information Technology Group > > Institutions do not have opinions, merely customs > > -- > -- > You received this message because you are a member of the iMac Group, a > group for those using Apple iMacs and eMacs. > The list FAQ is at http://lowendmac.com/imac/list.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to imaclist@googlegroups.com > To leave this group, send email to imaclist+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/imaclist > > --- > You received this message because you are subscribed to the Google Groups > "iMac Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to imaclist+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to imaclist@googlegroups.com To leave this group, send email to imaclist+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist --- You received this message because you are subscribed to the Google Groups "iMac Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to imaclist+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
